Dissolved organic carbon and nitrogen release from boreal Holocene permafrost and seasonally frozen soils of Alaska
Permafrost (perennially frozen) and active-layer (seasonally thawed) soils varying in soil carbon (C) and nitrogen (N) content and radiocarbon age were collected from three sites in interior Alaska to determine potential release of dissolved organic carbon (DOC), total dissolved N (TDN), dissolved organic nitrogen (DON), and dissolved inorganic nitrogen (DIN) upon thaw. Soil cores were cut into 15 cm thick sections, and deep active-layer (15-30 cm above the permafrost boundary) and shallow permafrost (15-30 cm below the permafrost boundary) sections were thawed and leached with deionized water. Soil leachates were analyzed for DOC, TDN, nitrate (NO3-), and ammonium (NH4+) concentrations, dissolved organic matter optical properties, and DOC biodegradability. Soils were analyzed for moisture content, bulk density, C, N, and radiocarbon content. Releases of dissolved carbon and nitrogen from soils are expressed as yields, with the units of milligrams (DOC, TDN, DIN, DON) per gram dry soil.
Citation Information
| Publication Year | 2018 |
|---|---|
| Title | Dissolved organic carbon and nitrogen release from boreal Holocene permafrost and seasonally frozen soils of Alaska |
| DOI | 10.5066/P9GG07SD |
| Authors | Kimberly P Wickland, Mark P Waldrop, Joshua C Koch, George R. Aiken, M.T. Jorgenson, Rob Striegl |
| Product Type | Data Release |
| Record Source | USGS Digital Object Identifier Catalog |
| USGS Organization | National Research Program |
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Dissolved organic carbon and nitrogen release from boreal Holocene permafrost and seasonally frozen soils of Alaska
Kimberly Wickland
Research Ecologist
Mark P Waldrop, Ph.D.
Research Soil Scientist
Rob Striegl
Emeritus Research Hydrologist
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Dissolved organic carbon and nitrogen release from boreal Holocene permafrost and seasonally frozen soils of Alaska
Permafrost (perennially frozen) soils store vast amounts of organic carbon (C) and nitrogen (N) that are vulnerable to mobilization as dissolved organic carbon (DOC) and dissolved organic and inorganic nitrogen (DON, DIN) upon thaw. Such releases will affect the biogeochemistry of permafrost regions, yet little is known about the chemical composition and source variability of active-layer (seasonaAuthorsKimberly P. Wickland, Mark P. Waldrop, George R. Aiken, Joshua C. Koch, M. Torre Jorgenson, Robert G. Striegl - Connect
Kimberly Wickland
Research EcologistEmailPhoneMark P Waldrop, Ph.D.
Research Soil ScientistEmailRob Striegl
Emeritus Research HydrologistEmailPhone